The Sigma is Vermeiren’s new powered mid-wheel wheelchair designed to perform on different terrains. From indoor smooth terrains to more rougher outdoor areas. The design has been constructed in such a way that all the 6 wheels stay in permanent contact with the ground to provide an continuous stability. The Sigma wheelchair is fully adjustable to your personal needs such as adjustable footrests, optional electronic footplate, adjustable seat depth and multi-functional armrests.